Fire Alarm Sequence of Operations Guide
How to read and review a fire alarm sequence of operations matrix for initiating devices, notification, elevator recall, HVAC shutdown, doors, and smoke control.
A fire alarm sequence of operations matrix explains what the building does when each fire alarm input activates. It connects initiating devices to notification appliances, relays, HVAC shutdown, elevator recall, smoke control, door release, monitoring, and supervisory signals.
The matrix should be reviewed against drawings from several disciplines because most fire alarm actions operate equipment designed by someone else.
Matrix Items to Review
Read each row as a cause-and-effect statement. If a duct detector activates, what shuts down? If sprinkler waterflow is detected, what annunciates? If smoke is detected in an elevator lobby, what recall sequence occurs?
- Initiating devices and monitored supervisory signals.
- Occupant notification by area, phase, or building zone.
- Elevator recall, shunt trip, machine room, and hoistway interfaces.
- HVAC shutdown, smoke dampers, fan control, and smoke control modes.
- Door release, access control, magnetic hold-opens, and security interfaces.
Testing Risk
Many fire alarm problems appear during acceptance testing because the device layout was reviewed but the control sequence was not. The matrix needs to match the equipment actually installed and the building zones actually shown on the plans.
Helonic helps reviewers compare the matrix to related drawings so interface gaps are found before final testing.
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